EP4063463A1 - Non-stick coating for metal surfaces - Google Patents
Non-stick coating for metal surfaces Download PDFInfo
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- EP4063463A1 EP4063463A1 EP22163156.7A EP22163156A EP4063463A1 EP 4063463 A1 EP4063463 A1 EP 4063463A1 EP 22163156 A EP22163156 A EP 22163156A EP 4063463 A1 EP4063463 A1 EP 4063463A1
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- formwork
- metallic element
- polyurea resin
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/02—Polyureas
Definitions
- the present invention relates to the coating of metal elements such as metal formwork, in particular the formwork, panels or assemblies of metal structures, more particularly steel such as stainless steel, intended to be used for the formwork of works or concrete castings.
- metal elements such as metal formwork, in particular the formwork, panels or assemblies of metal structures, more particularly steel such as stainless steel, intended to be used for the formwork of works or concrete castings.
- These formwork elements are light, allowing easy construction of structures with complex shapes and assemblies.
- the inventors realized surprisingly that it was possible to avoid the use of form oil by covering the metal surfaces with a one-component solvent-free polyurea resin which has the function of non-stick coating of concrete.
- the anti-adhesion property of the polyurea resin for concrete was also valid for other materials such as cement, clay, coatings, other types of resins (polyurethanes, epoxy for example ).
- the polyurea resin can therefore not only be applied to metal elements intended for formwork but also to any other type of metal elements which could be in contact with these materials, such as scaffolding to facilitate their complete cleaning, silos or hoppers such as cement silos, concrete mixers (in particular their internal lining, the chute and the back of the mixer which are easily soiled by concrete), conveyor belts and the workshop floors of concrete precasters.
- the present invention therefore relates to the use of a polyurea resin as an anti-adherent coating, in particular of concrete, of a metallic element, in particular intended for formwork.
- the polyurea resin is a single-component resin, more particularly hardening with the aid of humidity, even more particularly without solvent, advantageously having an adhesion on metal greater than 15 MPa according to standard EN 1542.
- the resin is aromatic, even more particularly obtained from an aromatic isocyanate prepolymer, for example of the MDI (diphenyl methane diisocyanate) type. It may be commercially available under the name KEBANCHE from the company
- the resin according to the invention does not contain silicone oil.
- the polyurea resin according to the invention is not a polyureasilazane resin.
- the thickness of the coating is between 60 ⁇ m and 1000 ⁇ m, in particular it is 750 ⁇ m.
- the coating can consist of one or more layers of the polyurea resin, more advantageously of 2 or 3 layers, in particular 3 layers.
- the coating is non-stick to concrete, cement, clay, coatings, other types of resins (polyurethanes, epoxy for example), more advantageously concrete, in particular reinforced concrete .
- the metal element is intended for formwork.
- it is a panel or a metal structure assembly, more particularly a formwork, which can have a varied or complex shape or assembly.
- It can also be scaffolding, silos or hoppers such as cement silos, concrete mixers (in particular the inside of the mixer, the chute and the back of the mixer which are easily soiled by the concrete), conveyor belts or the workshop floors of concrete precasters.
- silos or hoppers such as cement silos, concrete mixers (in particular the inside of the mixer, the chute and the back of the mixer which are easily soiled by the concrete), conveyor belts or the workshop floors of concrete precasters.
- the metallic element can be made of steel such as stainless steel.
- the metal element is intended for formwork and is not treated with formwork oil.
- the metallic element has not undergone any treatment before its coating.
- the polyurea resin according to the invention can be used only on the surfaces of the metal element intended to be in contact with the material whose adhesion is to be avoided, such as concrete, in particular reinforced concrete, cement, clay, coatings, other types of resins (polyurethanes, epoxy for example).
- the polyurea resin according to the invention can also be used on all the surfaces of the metal element, including those which are not intended to be in contact with the material whose adherence is to be avoided.
- Steps a) and b) can be repeated several times depending on the number of layers of resin that one wishes to apply and therefore on the total thickness of the film that one wishes to obtain on the metallic element in step vs).
- the metallic element in particular intended for formwork, the polyurea resin and its prepolymer are as described above. More particularly, the viscosity of the prepolymer of the one-component polyurea resin without solvent is 280 MPa.s at 30° C., measured by the Brookfield DV-E viscometer from Labomat.
- the metal element is not treated by a release oil, even more advantageously it has not undergone any prior treatment before step a) of the process.
- step b) is implemented by contact with the humidity of the air, in particular for at least 3 hours at 20° C., more particularly when the thickness of the layer of step a) is greater than or equal to 250 ⁇ m, for at least 4 hours at 20°C, even more particularly for at least 5 hours at 20°C.
- the film of step c) has a thickness of 60 ⁇ m to 1000 ⁇ m, in particular 750 ⁇ m, advantageously obtained in one or more successive layers, in particular in 1, 2 or 3 successive layers .
- the thickness of the layer of step a) is from 60 ⁇ m to 250 ⁇ m. More particularly, the application temperature of step a) is greater than -5°C.
- the content applied may be at least 150 g/m 2 of surface area, more particularly between 150 and 250 g/m 2 of surface area, even more particularly 250 g/m 2 of surface area.
- the at least one surface, in particular the surfaces, of the metallic element on which the layer is applied during step a) is intended to be in contact with the material whose adhesion is to be reduced, in particular concrete, cement, clay, coatings, other types of resins (polyurethanes, epoxy for example), more advantageously concrete, in particular reinforced concrete, advantageously the layer is applied to all the surfaces of this element, even those not intended to be in contact with this material.
- the material whose adhesion is to be reduced in particular concrete, cement, clay, coatings, other types of resins (polyurethanes, epoxy for example), more advantageously concrete, in particular reinforced concrete, advantageously the layer is applied to all the surfaces of this element, even those not intended to be in contact with this material.
- step a) comprises, in particular consists of, the manual application with a roller or using a notched squeegee of the layer of polyurea resin prepolymer on the at least one surface of the metallic element.
- step a) comprises, in particular consists of, the mechanical application by spraying using a single-component high-pressure (HP) pump of the layer of polyurea resin prepolymer on the at least one surface of the metallic element.
- HP high-pressure
- step a) comprises, in particular consists of, the mechanical application by electrostatic spraying using a single-component low-pressure (BP) pump of the layer of polyurea resin prepolymer on the at least one surface of the metallic element.
- BP single-component low-pressure
- the present invention finally relates to a metallic element, in particular intended for formwork, coated with a film of a polyurea resin, advantageously the thickness of the film of which is from 60 ⁇ m to 1000 ⁇ m, in particular 750 ⁇ m.
- the metallic element in particular intended for formwork, and the polyurea resin are as described above.
- the metal element has not been treated with formwork oil, even more advantageously has not undergone any treatment.
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Abstract
La présente invention concerne l'utilisation d'une résine polyurée comme revêtement anti-adhérent d'un élément métallique. Elle concerne en outre un procédé de traitement d'un élément métallique comprenant les étapes suivantes :- a) l'application d'une couche liquide de prépolymère de résine polyurée monocomposante sans solvant sur au moins une surface de l'élément métallique ;- b) la réticulation de la résine- c) la récupération d'un élément métallique dont au moins une des surfaces est revêtue d'un film en résine polyurée.Elle concerne enfin un élément métallique revêtu d'un film d'une résine polyurée.The present invention relates to the use of a polyurea resin as an anti-adherent coating for a metallic element. It also relates to a process for treating a metallic element comprising the following steps:- a) the application of a liquid layer of solvent-free single-component polyurea resin prepolymer on at least one surface of the metallic element;- b ) the crosslinking of the resin; c) the recovery of a metallic element of which at least one of the surfaces is coated with a film of polyurea resin. Finally, it relates to a metallic element coated with a film of a polyurea resin.
Description
La présente invention concerne le revêtement des éléments métalliques tels que les coffrages métalliques, en particulier les banches, panneaux ou assemblages de structures en métal, plus particulièrement en acier tel que l'acier inoxydable, destinés à servir au coffrage d'ouvrages ou d'objets moulés en béton. Ces éléments de coffrages sont légers, permettant facilement de réaliser des structures aux formes et assemblages complexes.The present invention relates to the coating of metal elements such as metal formwork, in particular the formwork, panels or assemblies of metal structures, more particularly steel such as stainless steel, intended to be used for the formwork of works or concrete castings. These formwork elements are light, allowing easy construction of structures with complex shapes and assemblies.
Les surfaces coffrantes métalliques sont actuellement traitées par aspersion d'huile de décoffrage pour permettre le démoulage du béton. Les inconvénients majeurs sont les suivants:
- pollution des sols (en France, près de 20000 tonnes d'huile sont répandues dans la nature, qui ensuite pollueront les nappes phréatiques. En Europe : plus de 100000 tonnes/an, soit plus de 1 000 000 tonnes sur 10 ans) ;
- les bétons sont souillés par l'huile, ce qui nuit à l'adhérence des peintures et enduits, et nécessite un traitement pour éliminer l'huile qui a imprégnée le béton ;
- en cas de béton brut architectonique, la couleur n'est pas uniforme en fonction de l'imprégnation de l'huile dans le béton car l'huile est une des causes des phénomènes de bullage du béton.
- soil pollution (in France, nearly 20,000 tons of oil are spread in nature, which will then pollute groundwater. In Europe: more than 100,000 tons/year, or more than 1,000,000 tons over 10 years);
- the concretes are soiled by oil, which affects the adhesion of paints and coatings, and requires treatment to remove the oil that has impregnated the concrete;
- in the case of architectural raw concrete, the color is not uniform depending on the impregnation of the oil in the concrete because the oil is one of the causes of the bubbling phenomena of the concrete.
Les inventeurs se sont aperçus de façon surprenante qu'il était possible d'éviter l'utilisation d'huile de décoffrage en recouvrant les surfaces métalliques d'une résine polyurée sans solvant monocomposante qui présente la fonction de revêtement anti-adhérent du béton.The inventors realized surprisingly that it was possible to avoid the use of form oil by covering the metal surfaces with a one-component solvent-free polyurea resin which has the function of non-stick coating of concrete.
Les avantages de l'utilisation de cette résine sont en particulier les suivants :
- démoulage aisé du béton ;
- béton obtenu uniformément blanc ;
- protection anti corrosion des surfaces métalliques ;
- aucune pollution de l'environnement, ni COV ;
- minimum de 100 cycles sans entretien ;
- facile à rénover par simple réapplication d'une nouvelle couche sur l'existante après léger ponçage superficiel.
- easy release of concrete;
- concrete obtained uniformly white;
- corrosion protection of metal surfaces;
- no environmental pollution or VOCs;
- minimum of 100 cycles without maintenance;
- easy to renovate by simply reapplying a new coat on the existing one after light surface sanding.
Par ailleurs les inventeurs se sont également aperçus que la propriété antiadhérence de la résine polyurée pour le béton était également valable pour d'autres matériaux tels que le ciment, l'argile, les enduits, les autres types de résines (polyuréthanes, époxy par exemple). La résine polyurée peut donc non seulement être appliquée sur des éléments métalliques destinés au coffrage mais également sur tout autre type d'éléments métalliques qui pourraient être en contact avec ces matériaux, tels que les échafaudages pour en faciliter leur nettoyage complet, les silos ou trémies tels que les silos à ciments, les toupies à bétons (en particulier leur revêtement interne, la goulotte et l'arrière de la toupie qui sont facilement salies par le béton), les bandes transporteuses et les sols d'atelier des préfabricateurs de béton.Furthermore, the inventors have also noticed that the anti-adhesion property of the polyurea resin for concrete was also valid for other materials such as cement, clay, coatings, other types of resins (polyurethanes, epoxy for example ). The polyurea resin can therefore not only be applied to metal elements intended for formwork but also to any other type of metal elements which could be in contact with these materials, such as scaffolding to facilitate their complete cleaning, silos or hoppers such as cement silos, concrete mixers (in particular their internal lining, the chute and the back of the mixer which are easily soiled by concrete), conveyor belts and the workshop floors of concrete precasters.
La présente invention concerne donc l'utilisation d'une résine polyurée comme revêtement anti-adhérent, en particulier du béton, d'un élément métallique, en particulier destiné au coffrage. De façon avantageuse, la résine polyurée est une résine monocomposante, plus particulièrement durcissant à l'aide de l'humidité, encore plus particulièrement sans solvant, avantageusement ayant une adhérence sur métal supérieure à 15 MPa selon la norme EN 1542. De façon particulièrement avantageuse, la résine est aromatique, encore plus particulièrement obtenue à partir d'un prépolymère isocyanate aromatique, par exemple de type MDI (diisocyanate de diphényl méthane). Elle peut être disponible commercialement sous la dénomination KEBANCHE chez la sociétéThe present invention therefore relates to the use of a polyurea resin as an anti-adherent coating, in particular of concrete, of a metallic element, in particular intended for formwork. Advantageously, the polyurea resin is a single-component resin, more particularly hardening with the aid of humidity, even more particularly without solvent, advantageously having an adhesion on metal greater than 15 MPa according to standard EN 1542. Particularly advantageously, the resin is aromatic, even more particularly obtained from an aromatic isocyanate prepolymer, for example of the MDI (diphenyl methane diisocyanate) type. It may be commercially available under the name KEBANCHE from the company
De façon encore plus avantageuse, la résine selon l'invention ne contient pas d'huile de silicone. En particulier la résine polyurée selon l'invention n'est pas une résine polyuréesilazane.Even more advantageously, the resin according to the invention does not contain silicone oil. In particular, the polyurea resin according to the invention is not a polyureasilazane resin.
De façon avantageuse l'épaisseur du revêtement est comprise entre 60 µm et 1000µm, en particulier elle est de 750 µm. Le revêtement peut consister en une ou plusieurs couches de la résine polyurée, plus avantageusement en 2 ou 3 couches, en particulier 3 couches.Advantageously, the thickness of the coating is between 60 μm and 1000 μm, in particular it is 750 μm. The coating can consist of one or more layers of the polyurea resin, more advantageously of 2 or 3 layers, in particular 3 layers.
Dans un mode de réalisation avantageux, le revêtement est anti-adhérent du béton, du ciment, de l'argile, des enduits, des autres types de résines (polyuréthanes, époxy par exemple), plus avantageusement du béton, en particulier du béton armé.In an advantageous embodiment, the coating is non-stick to concrete, cement, clay, coatings, other types of resins (polyurethanes, epoxy for example), more advantageously concrete, in particular reinforced concrete .
Avantageusement l'élément métallique est destiné au coffrage. En particulier il s'agit d'un panneau ou d'un assemblage de structure métallique, plus particulièrement d'une banche, qui peut avoir une forme ou un assemblage varié ou complexe.Advantageously, the metal element is intended for formwork. In particular, it is a panel or a metal structure assembly, more particularly a formwork, which can have a varied or complex shape or assembly.
Il peut également s'agir d'échafaudages, de silos ou trémies tels que les silos à ciments, les toupies à bétons (en particulier l'intérieur de la toupie, la goulotte et l'arrière de la toupie qui sont facilement salies par le béton), de bandes transporteuses ou des sols d'atelier des préfabricateurs de béton.It can also be scaffolding, silos or hoppers such as cement silos, concrete mixers (in particular the inside of the mixer, the chute and the back of the mixer which are easily soiled by the concrete), conveyor belts or the workshop floors of concrete precasters.
L'élément métallique peut être en acier tel que l'acier inoxydable.The metallic element can be made of steel such as stainless steel.
De façon particulièrement avantageuse, l'élément métallique est destiné au coffrage et n'est pas traité par une huile de décoffrage.Particularly advantageously, the metal element is intended for formwork and is not treated with formwork oil.
Dans un mode particulièrement avantageux, l'élément métallique n'a subi aucun traitement avant son revêtement.In a particularly advantageous mode, the metallic element has not undergone any treatment before its coating.
La résine polyurée selon l'invention peut être utilisée uniquement sur les surfaces de l'élément métalliques destinées à être en contact avec le matériau dont on veut éviter l'adhérence, tel que le béton, en particulier le béton armé, le ciment, l'argile, les enduits, les autres types de résines (polyuréthanes, époxy par exemple).The polyurea resin according to the invention can be used only on the surfaces of the metal element intended to be in contact with the material whose adhesion is to be avoided, such as concrete, in particular reinforced concrete, cement, clay, coatings, other types of resins (polyurethanes, epoxy for example).
La résine polyurée selon l'invention peut également être utilisée sur toutes les surfaces de l'élément métallique, y compris celles qui ne sont pas destinées à être en contact avec le matériau dont on veut éviter l'adhérence.The polyurea resin according to the invention can also be used on all the surfaces of the metal element, including those which are not intended to be in contact with the material whose adherence is to be avoided.
La présente invention concerne en outre un procédé de traitement d'un élément métallique, en particulier destiné au coffrage, comprenant les étapes suivantes:
- a) l'application d'une couche liquide de prépolymère de résine polyurée monocomposante sans solvant sur au moins une des surfaces de l'élément métallique ;
- b) la réticulation de la résine ;
- c) la récupération d'un élément métallique dont au moins une des surfaces est revêtue d'un film en résine polyurée.
- a) applying a liquid layer of one-component polyurea resin prepolymer without solvent on at least one of the surfaces of the metallic element;
- b) curing the resin;
- c) the recovery of a metallic element of which at least one of the surfaces is coated with a polyurea resin film.
Les étapes a) et b) peuvent être réitérées plusieurs fois en fonction du nombre de couches de résine que l'on souhaite appliquer et donc de l'épaisseur totale du film que l'on souhaite obtenir sur l'élément métallique à l'étape c).Steps a) and b) can be repeated several times depending on the number of layers of resin that one wishes to apply and therefore on the total thickness of the film that one wishes to obtain on the metallic element in step vs).
L'élément métallique, en particulier destiné au coffrage, la résine polyurée et son prépolymère sont tels que décrits ci-dessus. Plus particulièrement la viscosité du prépolymère de la résine polyurée monocomposante sans solvant est de 280 MPa.s à 30°C, mesurée par le Viscosimètre Brookfield DV-E de Labomat. Avantageusement l'élément métallique n'est pas traité par une huile de décoffrage, de façon encore plus avantageuse il n'a subi aucun traitement préalable avant l'étape a) du procédé.The metallic element, in particular intended for formwork, the polyurea resin and its prepolymer are as described above. More particularly, the viscosity of the prepolymer of the one-component polyurea resin without solvent is 280 MPa.s at 30° C., measured by the Brookfield DV-E viscometer from Labomat. Advantageously the metal element is not treated by a release oil, even more advantageously it has not undergone any prior treatment before step a) of the process.
De façon avantageuse l'étape b) est mise en œuvre par contact avec l'humidité de l'air, en particulier pendant au moins 3 heures à 20°C, plus particulièrement lorsque l'épaisseur de la couche de l'étape a) est supérieure ou égale à 250 µm, pendant au moins 4 heures à 20°C, encore plus particulièrement pendant au moins 5 heures à 20°C.Advantageously step b) is implemented by contact with the humidity of the air, in particular for at least 3 hours at 20° C., more particularly when the thickness of the layer of step a) is greater than or equal to 250 μm, for at least 4 hours at 20°C, even more particularly for at least 5 hours at 20°C.
Dans un mode de réalisation avantageux, le film de l'étape c) a une épaisseur de 60 µm à 1000 µm, en particulier de 750 µm, avantageusement obtenu en une ou plusieurs couches successives, en particulier en 1, 2 ou 3 couches successives.In an advantageous embodiment, the film of step c) has a thickness of 60 μm to 1000 μm, in particular 750 μm, advantageously obtained in one or more successive layers, in particular in 1, 2 or 3 successive layers .
Dans un autre mode de réalisation avantageux, l'épaisseur de la couche de l'étape a) est de 60 µm à 250 µm Plus particulièrement la température d'application de l'étape a) est supérieure à - 5°C. La teneur appliquée peut être d'au moins 150 g/m2 de surface, plus particulièrement comprise entre 150 et 250 g/m2 de surface, encore plus particulièrement de 250 g/m2 de surfaceIn another advantageous embodiment, the thickness of the layer of step a) is from 60 μm to 250 μm. More particularly, the application temperature of step a) is greater than -5°C. The content applied may be at least 150 g/m 2 of surface area, more particularly between 150 and 250 g/m 2 of surface area, even more particularly 250 g/m 2 of surface area.
Avantageusement la au moins une surface, en particulier les surfaces, de l'élément métallique sur laquelle est appliquée la couche lors de l'étape a) est destinée à être en contact avec le matériau dont on cherche à diminuer l'adhérence, en particulier le béton, le ciment, l'argile, les enduits, les autres types de résines (polyuréthanes, époxy par exemple), plus avantageusement le béton, en particulier le béton armé, de façon avantageuse la couche est appliquée sur toutes les surfaces de cet élément, même celles n'étant pas destinées à être en contact avec ce matériau.Advantageously, the at least one surface, in particular the surfaces, of the metallic element on which the layer is applied during step a) is intended to be in contact with the material whose adhesion is to be reduced, in particular concrete, cement, clay, coatings, other types of resins (polyurethanes, epoxy for example), more advantageously concrete, in particular reinforced concrete, advantageously the layer is applied to all the surfaces of this element, even those not intended to be in contact with this material.
Dans un mode de réalisation avantageux, l'étape a) comprend, en particulier est constituée par, l'application manuelle au rouleau ou à l'aide d'une raclette crantée de la couche de prépolymère de résine polyurée sur la au moins une surface de l'élément métallique.In an advantageous embodiment, step a) comprises, in particular consists of, the manual application with a roller or using a notched squeegee of the layer of polyurea resin prepolymer on the at least one surface of the metallic element.
Dans un autre mode de réalisation avantageux, l'étape a) comprend, en particulier est constituée par, l'application mécanique par projection à l'aide d'une pompe monocomposant haute pression (HP) de la couche de prépolymère de résine polyurée sur la au moins une surface de l'élément métallique.In another advantageous embodiment, step a) comprises, in particular consists of, the mechanical application by spraying using a single-component high-pressure (HP) pump of the layer of polyurea resin prepolymer on the at least one surface of the metallic element.
Dans encore un autre mode de réalisation avantageux, l'étape a) comprend, en particulier est constituée par, l'application mécanique par projection électrostatique à l'aide d'une pompe monocomposant bassepression (BP) de la couche de prépolymère de résine polyurée sur la au moins une surface de l'élément métallique.In yet another advantageous embodiment, step a) comprises, in particular consists of, the mechanical application by electrostatic spraying using a single-component low-pressure (BP) pump of the layer of polyurea resin prepolymer on the at least one surface of the metallic element.
La présente invention concerne enfin un élément métallique, en particulier destiné au coffrage, revêtu d'un film d'une résine polyurée, avantageusement dont l'épaisseur du film est de 60µm à 1000µm, en particulier de 750 µm.The present invention finally relates to a metallic element, in particular intended for formwork, coated with a film of a polyurea resin, advantageously the thickness of the film of which is from 60 μm to 1000 μm, in particular 750 μm.
L'élément métallique, en particulier destiné au coffrage, et la résine polyurée sont tels que décrits ci-dessus. Avantageusement l'élément métallique n'a pas été traité par une huile de décoffrage, de façon encore plus avantageuse n'a subi aucun traitement.The metallic element, in particular intended for formwork, and the polyurea resin are as described above. Advantageously, the metal element has not been treated with formwork oil, even more advantageously has not undergone any treatment.
L'invention sera mieux comprise à la lecture de la description de l'exemple qui suit qui est donné à titre indicatif non limitatif.The invention will be better understood on reading the description of the example which follows, which is given by way of non-limiting indication.
Le matin 9h application manuelle au rouleau à température ambiante d'une couche de 250µm de la résine KEBANCHE commercialisée par la société KEMICA COATINGS sur toutes les surfaces de la banche en une teneur de 250 g/m2 de surface. :
A midi, application au rouleau à température ambiante d'une 2ème couche de 250µm sur la première couche. A 16h application au rouleau à température ambiante d'une 3ème couche de 250µm sur la deuxième couche. L'épaisseur totale de revêtement obtenue est de 750µm.In the morning, 9 a.m. Manual application by roller at room temperature of a 250 µm layer of the KEBANCHE resin marketed by KEMICA COATINGS on all the surfaces of the formwork in a content of 250 g/m 2 of surface area. :
At noon, application by roller at room temperature of a 2nd layer of 250µm on the first layer. At 4 p.m. roller application at room temperature of a 3rd layer of 250 µm on the second layer. The total coating thickness obtained is 750 μm.
Le lendemain coulée du béton dans les banches. Le surlendemain, décoffrage. Aucun béton n'adhère à la banche et le décoffrage est donc facilement réalisé.The next day casting concrete in the formwork. The day after, stripping. No concrete adheres to the formwork and stripping is therefore easily carried out.
Claims (14)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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FR2102907A FR3121148B1 (en) | 2021-03-23 | 2021-03-23 | Non-stick coating of metal surfaces |
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EP4063463A1 true EP4063463A1 (en) | 2022-09-28 |
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EP22163156.7A Pending EP4063463A1 (en) | 2021-03-23 | 2022-03-21 | Non-stick coating for metal surfaces |
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FR (1) | FR3121148B1 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH09155285A (en) * | 1995-12-04 | 1997-06-17 | Nikken Toso Kogyo Kk | Durable non-sticky coating film on metallic surface |
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2021
- 2021-03-23 FR FR2102907A patent/FR3121148B1/en active Active
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2022
- 2022-03-21 EP EP22163156.7A patent/EP4063463A1/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH09155285A (en) * | 1995-12-04 | 1997-06-17 | Nikken Toso Kogyo Kk | Durable non-sticky coating film on metallic surface |
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FR3121148B1 (en) | 2023-05-12 |
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